ES6: Add support for Map/Set forEach

src/factory.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "factory.h"
 
 #include "macro-assembler.h"
 #include "isolate-inl.h"
 
 namespace v8 {
@@ skipping 1279 matching lines @@
                                                         Handle<Code> code) {
   Handle<JSFunction> function = NewFunctionWithoutPrototype(name, SLOPPY);
   function->shared()->set_code(*code);
   function->set_code(*code);
   ASSERT(!function->has_initial_map());
   ASSERT(!function->has_prototype());
   return function;
 }
 
 
+Handle<JSObject> Factory::NewIteratorResultObject(Handle<Object> value,
+                                                     bool done) {
+  Handle<Map> map(isolate()->native_context()->iterator_result_map());
+  Handle<JSObject> result = NewJSObjectFromMap(map, NOT_TENURED, false);
+  result->InObjectPropertyAtPut(
+      JSGeneratorObject::kResultValuePropertyIndex, *value);
+  result->InObjectPropertyAtPut(
+      JSGeneratorObject::kResultDonePropertyIndex, *ToBoolean(done));
+  return result;
+}
+
+
 Handle<ScopeInfo> Factory::NewScopeInfo(int length) {
   Handle<FixedArray> array = NewFixedArray(length, TENURED);
   array->set_map_no_write_barrier(*scope_info_map());
   Handle<ScopeInfo> scope_info = Handle<ScopeInfo>::cast(array);
   return scope_info;
 }
 
 
 Handle<JSObject> Factory::NewExternal(void* value) {
   Handle<Foreign> foreign = NewForeign(static_cast<Address>(value));
@@ skipping 938 matching lines @@
   if (String::Equals(name, nan_string())) return nan_value();
   if (String::Equals(name, infinity_string())) return infinity_value();
   return Handle<Object>::null();
 }
 
 
 Handle<Object> Factory::ToBoolean(bool value) {
   return value ? true_value() : false_value();
 }
 
+
 } }  // namespace v8::internal